I've had 2 letters from HMRC recently, for specifically named clients, that carry no return address or contact telephone number. There's no way of contacting anyone directly about the content of the letters. I see that others here have mentioned the same phenomenon on correspondence on other matters. Yes, it mildly irritates me to get such unprofessional letters from HMRC but what I really object to is their arrogance in adopting a policy that is clearly designed to stiffle any possible engagement with agents by sending out unilateral missives from inside an impenetrable bunker. Or are they just being pragmatic and finally acknowledging something we have known for ages - that it is completely futile trying to make contact with anyone who can actually help at HMRC?